Template

ABSTRACT

A template for use in controlled sewing devices for sewing pieces of material together along their edges. The template consists of essentially a base plate having a plurality of spaced slot-shaped clearances in which can be received a plurality of clamping means corresponding to the size and shape of the workpieces.

llnite ates atent 1 Sugland Aug. 13, 1974 TEMPLATE [75] Inventor: Wolfgang Sugland, Herford,

Germany [73] Assignee: Koehs Adler AG, Bielefeld, Germany [22] Filed: Dec. 27, 1972 [21] Appl. No.: 318,841

[30] Foreign Application Priority Data Dec. 27, 1971 Germany 2164862 [52] US. Cl. 1l2/121.15, 269/37 [51] Int. Cl D05b 21/00 [58] Field0fSearch..... 112/12l.l2,121.l1, 121.15, 112/102; 74/569, 568 R; 269/254 CS, 254 R, 37, 40, 43, 44, 45, 152, 153, 265, 266, 279,

[56] References Cited UNITED STATES PATENTS 1,048,821 12/1912 Gill 269/43 2,041,628 5/1936 Tillett 1l2/l21.15 2,754,780 7/1956 H0lmes-Higgin.... l12/l21.l2 3,151,583 10/1964 Troll et a1. 112/121.1l 3,174,447 3/1965 Bono 112/121.12 3,407,759 10/1968 Scholl et a1. ll2/l2l.12

Primary Examiner-.lames R. Boler Assistant Examiner-Wai M. Chan Attorney, Agent, or FirmJacob L. Kollin, Esq.

[5 7] ABSTRACT A template for use in controlled sewing devices for sewing pieces of material together along their edges. The template consists of essentially a base plate having a plurality of spaced slot-shaped clearances in which can be received a plurality of clamping means corresponding to the size and shape of the workpieces.

5 Claims, 4 Drawing Figures PATENTEU GI 4 3.828.703

SHEET 1 [IF 2 TEMPLATE BACKGROUND OF THE INVENTION The invention relates to a template for use in automatic sewing devices, which is invertible and adjustable for receiving workpiece cuts of different lengthsand form, which are to be sewn along their edges.

In the US. Pat. No. 3,174,447 and 3,407,759 there are disclosed adjustable fabric holding devices for automatic sewing machine installations. However, these known fabric holding devices are only adjustable for receiving workpiece cuts of different length but of the same form.

It is an object of the invention to reduce the number of workpiece clamping devices required in the known sewing installations for receiving workpiece cuts of different forms and sizes in order to reduce the high expenditure resulting from the changeover of the sewing installation to the desired forms and sizes.

It is a further object of the invention to provide a template for automatic sewing installations which is adapted to replace the plurality of the workpiece clamping devices required heretofore, in order to clamp workpieces of the same kind as well as those of a different kind and size.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of the template according to the invention,

FIG. 2 is a partial top plan view of the template,

FIG. 3 is a partial top plan view taken on line III-III of FIG. 2, and

FIG. 4 is a perspective view on an enlarged scale of the fastening means for securing the clamping means within the slot-shaped clearances of the base plate.

DESCRIPTION OF THE PREFERRED EMBODIMENT Two homologously formed base plates 1, 2 (FIGS. 1 and 2) are provided with oblong holes 3, which serve for movably securing the base plates 1, 2 to a sewing installation, not shown. The base plates 1, 2 have recesses 4 and carry end plates 5 which are provided with oblong holes 6 for displacement with regard to the base plates 1, 2 and securement by means of screws 7.

The base plates 1, 2 and the end plates 5 have slotshaped clearances 8 for receiving proportionally narrow workpiece clamping holders 9 (FIGS. 1 to 3). The latter comprise a workpiece supporting beam 10, a jack II which is connected with the workpiece supporting beam 10 by means of a cylindrical member 12, a workpiece clamping plate 13, a two-armed lever 14, to the one arm of which is hinged the workpiece clamping plate 13, and a fastening means 16.

The two-armed lever 14 is pivoted about a bolt 18 within a recess 17, which is in the jack 11. On the projecting end of the bolt 18 is arranged a torsion spring 19, the ends of which abut against a pin 20 and the free arm 21 of the two-armed lever 14.

The fastening means 16 comprises an U-shaped hand lever formed with clamping edges 23 and pivoted about an eccentric bolt 24. The eccentric bolt 24 is pivotally attached in a bore 25 provided in the jack 11 and secured therein by means of a clamping screw 26. The cylindrical shafts 27, 28 of the bolt 24 have different diameters and serve for bearing the hand lever 22, which for this purpose is provided with coaxially extending bores 29, 30 of different diameters. A spring plate 32 is secured to the jack 11 by means of the screw 26 and a nut 31 located thereon. The angular part 33 of the spring plate 32 is located between the jack 11 and the base plates 1, 2 or the end plates 5 when the workpiece clamping holder 9 is received in the base plates 1, 2 or end plates 5, whereby the hand lever 22 acts upon the angular part 33 with the clamping edges 23.

According to the form of a workpiece (in FIG. 2 is shown a collar cut) workpiece clamping plates 35 arranged on the end plates 5, are formed in accordance with the form of the collar cut 34 with angular workpiece supporting beams 36 and elongated workpiece clamping plates 37.

For simultaneously opening the clamping plates 13, 37 the workpiece clamping holders 9, 35 are operated by means of an actuating means 38 having an actuating bar 39 which consists of two halves 39' and 39 by means of screws 41 and the other end is provided with an oblong hole 42 in which the screw 43, inserted in the half 39, is displaceable. The free ends of the actuating bar 39 are provided with plates 44, to which are articulated parallel guides 45, 46, the free ends of which are pivoted to bearing blocks 47 located in the base plates 1, 2.

By means of air cylinders 48 engaging the guides 45, the actuating bar 39 can act upon the free arms 21 of the two-armed levers 14, in order to open all workpiece clamping holders 9 and 35 simultaneously.

After releasing the clamping effect by actuating the hand lever 22, the workpiece clamping holders 9, 35 may be displaced as well as seivelled within the slotshaped clearances 8, in order to prepare the template for receiving workpieces having another form. For receiving longer workpieces it is necessary to separate the base plates 1, 2 from one another after releasing the screws in the oblong holes 3 and the screw 43 of the bridge 40. For clamping smaller workpieces it may be necessary to remove a number of workpiece clamping holders 9, 35.

What I claim is:

l. A template for use in controlled sewing devices for sewing pieces of material together along their edges, having base plate means provided with a plurality of spaced slot-shaped clearances, a plurality of clamping means, each of said clamping means adapted to clamp only a part of said pieces of material adjacent the edge to be sewn, and including fastening means securing said clamping means within said slot-shaped clearances of said base plate means, pressing means for holding said clamping means in a closed position, and actuating means for simultaneously opening or closing said plurality of clamping means, each of said clamping means comprises a workpiece supporting beam, a jack carrying said fastening means for securing said clamping means within said slot-shaped clearances of said base plate means and said pressing means for holding said clamping means in a closed position, a cylindrical member secured to said workpiece supporting beam and said jack and slidably received in said slot-shaped clearances of said base plate means, a two-armed lever, pivoting means between said two-armed lever and said jack, and a workpiece clamping plate linked to one arm of said two-armed lever and cooperating with said workpiece supporting beam.

2. A template according to claim 1, wherein said fastening means for securing said clamping means within said slot-shaped clearances of said base plate comprises a spring plate having an opening for said cylindrical member and secured to said jack, a bolt having two coaxial cylindrical shafts of different diameter and an eccentrical shaft received in a bore of said jack, a hand lever having two shanks provided with two bores of different diameter, for receiving said bolt, and provided with clamping edges for cooperating with said spring plate, and a fastening means for securing said bolt and said spring plate to said jack.

3. A template according to claim 1, wherein said pressing means for holding said clamping means in a closed position comprises a torsion spring received by said pivoting means being between said two-armed lever and said jack, and having two straight ends, one of said ends acting upon the other arm of said twoarmed lever, and a bolt inserted in said jack for supporting the other end of said torsion spring.

4. A template according to claim 1, wherein said actuating means for simultaneously opening and closing said plurality of clamping means includes an actuating bar cooperating with the other arms of said two-armed levers, control lever means connected with said base plate means and carrying said actuating bar, and driving means cooperating with said control lever means for moving said actuating bar up and down.

5. A template for use in controlled sewing devices for sewing pieces of material together along their edges, comprising a two-part base plate, an additional base plate displaceably secured to each part of said two-part base plate, said two-part base plate and said additional base plate being provided with a plurality of spaced slot-shaped clearances, a plurality of clamping means each including a workpiece supporting beam, a twoarmed lever pivotally secured to said supporting beam, a workpiece clamping plate linked to one arm of said two-armed lever and cooperating with said workpiece supporting beam, pressing means for holding said clamping means in a closed position, fastening means securing said clamping means within said slot-shaped clearances of said base plates, and actuating means for simultaneously opening and closing said plurality of clamping means, comprising an elongatable actuating bar cooperating with the other arms of said two-armed levers, a control lever means connected with each part of said two-part base plates and carrying said actuating bar, and air cylinders cooperating with said control lever means for moving said actuating bar up and down. 

1. A template for use in controlled sewing devices for sewing pieces of material together along their edges, having base plate means provided with a plurality of spaced slot-shaped clearances, a plurality of clamping means, each of said clamping means adapted to clamp only a part of said pieces of material adjacent the edge to be sewn, and including fastening means securing said clamping means within said slot-shaped clearances of said base plate means, pressing means for holding said clamping means in a closed position, and actuating means for simultaneously opening or closing said plurality of clamping means, each of said clamping means comprises a workpiece supporting beam, a jack carrying said fastening means for securing said clamping means within said slot-shaped clearances of said base plate means and said pressing means for holding said clamping means in a closed position, a cylindrical member secured to said workpiece supporting beam and said jack and slidably received in said slotshaped clearances of said base plate means, a two-armed lever, pivoting means between said two-armed lever and said jack, and a workpiece clamping plate linked to one arm of said two-armed lever and cooperating with said workpiece supporting beam.
 2. A template according to claim 1, wherein said fastening means for securing said clamping means within said slot-shaped clearances of said base plate comprises a spring plate having an opening for said cylindrical member and secured to said jack, a bolt having two coaxial cylindrical shafts of different diameter and an eccentrical shaft received in a bore of said jack, a hand lever having two shanks provided with two bores of different diameter, for receiving said bolt, and provided with clamping edges for cooperating with said spring plate, and a fastening means for sEcuring said bolt and said spring plate to said jack.
 3. A template according to claim 1, wherein said pressing means for holding said clamping means in a closed position comprises a torsion spring received by said pivoting means being between said two-armed lever and said jack, and having two straight ends, one of said ends acting upon the other arm of said two-armed lever, and a bolt inserted in said jack for supporting the other end of said torsion spring.
 4. A template according to claim 1, wherein said actuating means for simultaneously opening and closing said plurality of clamping means includes an actuating bar cooperating with the other arms of said two-armed levers, control lever means connected with said base plate means and carrying said actuating bar, and driving means cooperating with said control lever means for moving said actuating bar up and down.
 5. A template for use in controlled sewing devices for sewing pieces of material together along their edges, comprising a two-part base plate, an additional base plate displaceably secured to each part of said two-part base plate, said two-part base plate and said additional base plate being provided with a plurality of spaced slot-shaped clearances, a plurality of clamping means each including a workpiece supporting beam, a two-armed lever pivotally secured to said supporting beam, a workpiece clamping plate linked to one arm of said two-armed lever and cooperating with said workpiece supporting beam, pressing means for holding said clamping means in a closed position, fastening means securing said clamping means within said slot-shaped clearances of said base plates, and actuating means for simultaneously opening and closing said plurality of clamping means, comprising an elongatable actuating bar cooperating with the other arms of said two-armed levers, a control lever means connected with each part of said two-part base plates and carrying said actuating bar, and air cylinders cooperating with said control lever means for moving said actuating bar up and down. 